Metal rear cover for terminal and terminal

ABSTRACT

A metal rear cover for the terminal (100) and a terminal are provided. The metal rear cover for the terminal (100) includes a base plate (10) provided with at least one micro-seam band (20), the micro-seam band (20) is provided with a plurality of micro-seams (21), and the at least one micro-seam band (20) divides the base plate (10) into at least two radiation parts (30). At least one of the at least two radiation parts (30) is configured to be coupled to a matching circuit (1) and to receive a feeding signal via the matching circuit (1).

CROSS-REFERENCE TO RELATED APPLICATION

This application is a national phase entry under 35 USC § 371 ofInternational Application PCT/CN2017/077166, filed Mar. 18, 2017, whichis based on and claims a priority to Chinese Patent Application SerialNo. 201610161748.9, filed Mar. 18, 2016, the entire contents of whichare incorporated herein by reference.

FIELD

The present disclosure relates to a field of electronic devices, moreparticularly to a metal rear cover for a terminal and a terminal.

BACKGROUND

At present, a metal rear cover of a mobile phone is generally providedwith two plastic isolation strips to divide the metal rear cover intothree segments of metal parts, so that a radio frequency efficiency ofan antenna within the mobile phone can be improved by means of slitsamong the metal parts. However, as the user has increasingly higherappearance requirements of the mobile phone, a proportion of the metalportion of the metal rear cover of the mobile phone is required toincrease, thus resulting in a decrease of a proportion of the plasticisolation strip. In this case, with the decrease of the proportion ofthe plastic isolation strip, the radio frequency efficiency of theantenna within the mobile phone is reduced, thus affecting a userexperience of the mobile phone.

SUMMARY

In view of this, the present disclosure provides a metal rear cover fora terminal and a terminal, which can improve a user experience.

The present disclosure provides a metal rear cover for a terminal. Themetal rear cover for the terminal includes a base plate provided with atleast one micro-seam band, the micro-seam band is provided with aplurality of micro-seams, the at least one micro-seam band divides thebase plate into at least two radiation parts, and at least one of the atleast two radiation parts is configured to be coupled a matching circuitand to receive a feeding signal via the matching circuit.

The present disclosure provides another metal rear cover for a terminalThe metal rear cover for the terminal includes a base plate and aconducting switch. The base plate is provided with at least onemicro-seam band, and the at least one micro-seam band divides the baseplate into at least two radiation parts. At least one of the at leasttwo radiation parts is configured to be coupled to a matching circuitand to receive a feeding signal via the matching circuit. The conductingswitch is coupled between the at least two radiation parts, andconfigured to disconnect or connect the at least two radiation parts.

The present disclosure further provides a terminal The terminal includesa metal rear cover, a front cover and a mainboard. The metal rear coverincludes a base plate provided with at least one micro-seam band, andthe at least one micro-seam band divides the base plate into at leasttwo radiation parts. At least one of the at least two radiation parts isconfigured to be coupled to a matching circuit and to receive a feedingsignal via the matching circuit. The front cover and the metal rearcover are coupled to and cover each other. The mainboard is fixedbetween the front cover and the metal rear cover, and the mainboard isprovided with the matching circuit electrically coupled to the at leastone of the at least two radiation parts.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe technical solutions in embodiments of the present disclosuremore clearly, the accompanying drawings required for the description ofthe embodiments will be briefly introduced in the following. Obviously,the accompanying drawings described below only show some embodiments ofthe present disclosure, and those skilled in the art can obtain otherdrawings based on these drawings without paying creative efforts.

FIG. 1 is a schematic view of a metal rear cover for the terminalaccording to a first embodiment of the present disclosure.

FIG. 2 is a schematic view of a metal rear cover for the terminalaccording to a second embodiment of the present disclosure.

FIG. 3 is a schematic view of a metal rear cover for the terminalaccording to a third embodiment of the present disclosure.

FIG. 4 is another schematic view of the metal rear cover for theterminal according to the first embodiment of the present disclosure.

DETAILED DESCRIPTION

Technical solutions in embodiments of the present disclosure will beclearly and completely described below with reference to theaccompanying drawings in the embodiments of the present disclosure.

As illustrated in FIG. 1, the present disclosure provides a metal rearcover 100 for a terminal The metal rear cover 100 for the terminalincludes a base plate 10 provided with at least one micro-seam band 20,and the micro-seam band 20 includes a plurality of micro-seams 21. Theat least one micro-seam band 20 divides the base plate 10 into at leasttwo radiation parts 30, and at least one of the at least two radiationparts 30 is configured to be coupled to a matching circuit 1 and to emitan electromagnetic wave. In some embodiments of the present disclosure,the metal rear cover for the terminal can be applied to a terminal,serving as a rear cover of the terminal so as to protect the terminal,and can be fitted with a display panel of the terminal to form a housingof the terminal The terminal can be a mobile phone, a tablet computer, anotebook computer or the like.

By providing the at least one micro-seam band 20 to the base plate 10 ofthe metal rear cover 100 for the terminal, the at least one micro-seamband 20 divides the base plate 10 into at least two radiation parts 30.By providing the micro-seam band 20 with the plurality of micro-seams21, a proportion of a non-metal portion of the metal rear cover 100 forthe terminal is reduced. At least one of the radiation parts 30 iscoupled to the matching circuit 1, to radiate the electromagnetic wave,such that the metal rear cover 100 for the terminal itself can achieve aradio frequency of an antenna, and a radio frequency efficiency of theantenna is improved. Moreover, under the premise of satisfying overallappearance requirements of the terminal, the radio frequency efficiencyof the antenna is improved, thereby improving a user experience.

In some embodiments of the present disclosure, the base plate 10 is arectangular plate member. The base plate 10 can bear a mainboard andother functional components in the terminal at an inner side of the baseplate 10, and can protect the mainboard and the functional components.The micro-seam band 20 can be formed by means of laser cutting. Theradiation part 30 is a metal sheet formed due to the dividing of themicro-seam band 20. The radiation part 30 coupled to the matchingcircuit 1 is provided with a feeding point 31, and the feeding point 31is coupled to the matching circuit 1, so that the radiation part 30 canreceive a feeding signal, and can generate the electromagnetic wave,thereby resulting in the radio frequency of the antenna. The matchingcircuit 1 can be disposed to the mainboard of the terminal. The matchingcircuit 1 is configured to regulate an impedance matching of theradiation part 30, so that a radio frequency signal of the radiationpart 30 can be stable, thus improving the radio frequency efficiency ofthe antenna. The radiation part 30 coupled to the matching circuit 1 canalso be coupled to a radio frequency transceiving circuit 2. Thematching circuit 1 is provided between the radio frequency transceivingcircuit and the radiation part 30.

Further, as illustrated in FIG. 1 again, a first embodiment is provided,and the base plate 10 is provided with one micro-seam band 20. Themicro-seam band 20 extends along a width direction of the base plate 10,and the one micro-seam band 20 divides the base plate 10 into tworadiation parts 30. The micro-seam band 20 is adjacent to one side edgeof the base plate 10 along a length direction of the base plate 10.Further, when the metal rear cover 100 for the terminal is applied tothe terminal, the micro-seam band 20 can be located at a bottom of theterminal, so that the matching circuit 1 can be conveniently provided atthe bottom of the terminal, and the matching circuit 1 can be coupled tothe radiation part 30 at the bottom of the terminal, thus fullyutilizing a bottom space of the terminal and hence reducing a thicknessof the terminal. In some embodiments of the present disclosure, themicro-seam band 20 divides the base plate 10 into a first radiation part311 and a second radiation part 312, and an area of the first radiationpart 311 is smaller than an area of the second radiation part 312. Thefirst radiation part 311 is coupled to the matching circuit 1, and thesecond radiation part 312 is isolated from the first radiation part 311.When the metal rear cover 100 for the terminal is applied to theterminal, the first radiation part 311 is located at the bottom of theterminal. In other embodiments, the first radiation part 311 can also beprovided at a top of the terminal; the second radiation part 312 canalso be coupled to another matching circuit, so that the metal rearcover 100 for the terminal can achieve two radio frequency ranges, thusbroadening a radio frequency bandwidth of the antenna; and themicro-seam band 20 can also extend along the length direction of thebase plate 10.

As illustrated in FIG. 2, a second embodiment substantially identical tothe first embodiment is provided, but differs from the first embodimentin that the base plate 10 is provided with two micro-seam bands 20. Thetwo micro-seam bands 20 are adjacent to two side edges of the base plate10 along the length direction of the base plate 10, respectively. Thatis, one micro-seam band 20 is adjacent to a side edge of the base plate10 in the length direction of the base plate 10, and the othermicro-seam band 20 is adjacent to another side edge of the base plate 10opposite to the above side edge of the base plate 10. In someembodiments of the present disclosure, the two micro-seam bands 20divide the base plate 10 into a first radiation part 321, a secondradiation part 322 and a third radiation part 323 arranged sequentially.The two micro-seam bands 20 are parallel to each other. The firstradiation part 321 is coupled to a first matching circuit 1 a and thethird radiation part 323 is coupled to a second matching circuit 1 b,respectively. The second radiation part 322 is coupled with the firstradiation part 321 and the third radiation part 323, so that a radiofrequency range of the first radiation part 321 is different from aradio frequency range of the third radiation part 323. Furthermore, thesecond radiation part 322 can be grounded, so that the second radiationpart 322 is coupled between the first radiation part 321 and the thirdradiation part 323 and also generates the radio frequency, so that themetal rear cover 100 for the terminal can further generate a pluralityof radio frequency ranges, thus broadening the radio frequency bandwidthand improving the radio frequency efficiency. In other embodiments, itis also possible that the first radiation part 321 is provided with aground point isolated from the feeding point 31, the ground point iscoupled to a grounding electrode, so that the radio frequency bandwidthof the first radiation part 321 can be broadened; or the third radiationpart 323 is also grounded, that is, at least one of the at least tworadiation parts 30 is grounded.

As illustrated in FIG. 3, a third embodiment substantially identical tothe first embodiment is provided, but differs from the first embodimentin that the at least one micro-seam band 20 is annularly provided alonga direction parallel to a circumferential direction of the base plate10. The at least one micro-seam band 20 includes one micro-seam band 20,and the one micro-seam band 20 divides the base plate 10 into a firstradiation part 331 located at a circumferential edge of the base plate10, and a second radiation part 322 located inside the first radiationpart 331. The first radiation part 331 is coupled to the matchingcircuit 1. Therefore, the first radiation part 331 constitutes a loopantenna, and the metal rear cover 100 for the terminal can achievetransceiving of special radio frequency ranges. Furthermore, a metalstrip between two adjacent micro-seams 21 within the micro-seam band 20constitutes an annular wire, and a plurality of metal strips among themicro-seams 21 can constitute a loop electromagnetic coil after theplurality of metal strips is supplied with a current, so that the metalrear cover 100 can achieve a near field radio frequency function, thusfurther improving the user experience.

Further, as illustrated in FIG. 1, the plurality of micro-seams 21 arearranged equidistantly, and a distance between two adjacent micro-seams21 is greater than a seam width of the micro-seam 21. In someembodiments of the present disclosure, in each micro-seam 20, a ratio ofa width between two adjacent micro-seams 21 to the seam width of themicro-seam 21 ranges from 1.5 to 2.0, so that a proportion of themicro-seams 21 is small and a user cannot distinguish the micro-seams bynaked eyes, thus further improving an appearance effect of the metalrear cover 100 for the terminal.

In some embodiments of the present disclosure, the seam width of themicro-seam 21 is 0.05 mm to 0.3 mm, and the number of the micro-seams 21is 5 to 10. A minimum of the seam width of the micro-seam 21 is ensuredto be 0.05 mm, so that the micro-seam 21 cannot be directlydistinguished by the user, and the lowest radio frequency efficiency ofthe metal rear cover 100 for the terminal can be ensured. Inversely, amaximum of the seam width of the micro-seam 21 is ensured to be 0.3 mm,so that the radio frequency efficiency of the metal rear cover 100 forthe terminal can be improved. Similarly, a minimum of the number of themicro-seams 21 is controlled to be 5, so as to satisfy the appearancerequirements of the metal rear cover 100 for the terminal, and a maximumof the number of the micro-seams 21 is controlled to be 10, so as toimprove the radio frequency efficiency of the metal rear cover 100 forthe terminal. The thickness of the base plate 10 is 0.5 mm to 1.5 mm, sothat a thickness of the radiation part 30 is controlled to be 0.5 mm to1.5 mm, an internal resistance impedance of the radiation part 30 canfurther be controlled, and a performance of the radiation part 30 beingcoupled to feeding can be improved, thereby improving the radiofrequency efficiency of the metal rear cover 100 for the terminal. Thewidth of the micro-seam band 20 is 1.5 mm to 5.0 mm, so that theproportion of the micro-seam band 20 to the entire metal rear cover 100for the terminal is small, thereby improving the appearance effect ofthe metal rear cover 100 for the terminal.

Further, as illustrated in FIG. 1 again, in the first embodiment, themetal rear cover 100 for the terminal further includes a circumferentialframe 40 fixed to the circumferential edge of the base plate 10, and themicro-seam band 20 runs through the circumferential frame 40. In someembodiments of the present disclosure, the circumferential frame 40 andthe base plate 10 are integrally formed, and the circumferential frame40 can protect a circumferential side of the terminal The micro-seamband 20 is formed by laser cutting the circumferential frame 40 and thebase plate 10 sequentially, so that the micro-seam band 20 defines aclearance area, and further the radio frequency efficiency of the metalrear cover 100 for the terminal is improved.

In the first embodiment of the present disclosure, the metal rear cover100 for the terminal further includes a light-transparent and signalnon-shielding material completely filled in the micro-seam 21. When themetal rear cover 100 for the terminal is applied to the terminal, theterminal is provided with a breathing light (not illustrated)corresponding to the micro-seam band 20 in the terminal, so that thelight-transparent and signal non-shielding material within themicro-seam 21 can transmit light rays of the breathing light, the usercan see the light rays of the breathing light from outside of the metalrear cover 100 for the terminal, so as to understand an operationcondition of the terminal, thus enhancing the appearance effect of theterminal and improving the user experience. More preferably, thelight-transparent and signal non-shielding material employs a lightguiding material, so that the micro-seam band 20 exhibits a light-bandshape, and the appearance effect of the metal rear cover 100 for theterminal can be further improved.

Further, as illustrated in FIG. 4, a conducting switch 33 is coupledbetween the at least two radiation parts 30, and the conducting switch33 is configured to connect or disconnect the at least two radiationparts 30. In the first embodiment of the present disclosure, theconducting switch 33 is coupled between the first radiation part 311 andthe second radiation part 312. When the conducting switch 33 connectsthe first radiation part 311 with the second radiation part 312, thefirst radiation part 311 and the second radiation part 312 are bothcoupled to the feeding signal, so that the metal rear cover 100 for theterminal can achieve the transceiving of a first preset frequency range.When the conducting switch 33 disconnects the first radiation part 311with the second radiation part 312, only the first radiation part 311 iscoupled to the feeding signal, so that only the first radiation part 311generates the radio frequency, that is, the metal rear cover 100 for theterminal can achieve the transceiving of a second preset frequencyrange. Therefore, by turning the conducting switch 33 off or on, afrequency selection function of the metal rear cover 100 for theterminal can be achieved, thus further improving the user experience.

The present disclosure further provides a terminal (not illustrated),the terminal includes the metal rear cover 100 for the terminal, and theterminal further includes a front cover (not illustrated) and amainboard (not illustrated). The front cover and the metal rear cover100 for the terminal cover each other and are coupled to each other, themainboard is fixed between the front cover and the metal rear cover 100for the terminal, and the mainboard is provided with the matchingcircuit electrically coupled to the radiation part 30. In someembodiments of the present disclosure, the terminal can be a mobilephone, a tablet computer, or a notebook computer.

In the metal rear cover for the terminal and the terminal according tothe present disclosure, by providing the at least one micro-seam band tothe base plate of the metal rear cover for the terminal, the at leastone micro-seam band divides the base plate into the at least tworadiation parts. By providing the micro-seam band with the plurality ofmicro-seams, a proportion of a non-metal portion of the metal rear coverfor the terminal is reduced. At least one of the radiation parts iscoupled to the matching circuit, to radiate the electromagnetic wave,such that the metal rear cover for the terminal itself can achieve aradio frequency of an antenna, and a radio frequency efficiency of theantenna is improved. Moreover, under the premise of satisfying overallappearance requirements of the terminal, the radio frequency efficiencyof the antenna is improved, thereby improving a user experience.

The above reveals preferred embodiments of the present disclosure, itshould be noted that, it is also possible for those skilled in the artto further make some improvements and modifications without departingfrom the principle of the present disclosure, and these improvements andmodifications are deemed to fall into the scope of the presentdisclosure.

1. A metal rear cover for a terminal, comprising a base plate providedwith at least one micro-seam band, the at least one micro-seam bandcomprising a plurality of micro-seams, the at least one micro-seam banddividing the base plate into at least two radiation parts, at least oneof the at least two radiation parts being configured to be coupled to amatching circuit and to receive a feeding signal via the matchingcircuit.
 2. The metal rear cover for the terminal according to claim 1,wherein the plurality of micro-seams are arranged equidistantly.
 3. Themetal rear cover for the terminal according to claim 2, wherein adistance between two adjacent micro-seams is greater than a width of themicro-seam.
 4. The metal rear cover for the terminal according to claim3, wherein the width of the micro-seam is 0.05 mm to 0.3 mm.
 5. Themetal rear cover for the terminal according to claim 3, wherein athickness of the base plate is 0.5 mm to 1.5 mm.
 6. The metal rear coverfor the terminal according to claim 3, wherein a width of the at leastone micro-seam band is 1.5 mm to 5.0 mm.
 7. The metal rear cover for theterminal according to claim 1, wherein the at least one micro-seam banddivides the base plate along a direction parallel to a length directionor a width direction of the base plate.
 8. The metal rear cover for theterminal according to claim 7, wherein the at least one micro-seam bandcomprises two micro-seam bands, one of the two micro-seam bands isadjacent to a first side edges of the base plate along the lengthdirection of the base plate, and the other one of the two micro-seambands is adjacent to a second side edge of the base plate opposite tothe first side edge of the base plate.
 9. The metal rear cover for theterminal according to claim 8, wherein the two micro-seam bands dividethe base plate into a first radiation part, a second radiation part anda third radiation part arranged sequentially, the second radiation partis coupled with the first radiation part and the third radiation part,the first radiation part is coupled to a first matching circuit, and thesecond radiation part is coupled to a second matching circuit.
 10. Themetal rear cover for the terminal according to claim 9, wherein thesecond radiation part is grounded.
 11. The metal rear cover for theterminal according to claim 1, wherein the at least one micro-seam bandis provided annularly along a direction parallel to a circumferentialdirection of the base plate.
 12. The metal rear cover for the terminalaccording to claim 11, wherein the at least one micro-seam band dividesthe base plate into a first radiation part located at a circumferentialedge of the base plate, the first radiation part is coupled to thematching circuit, and the first radiation part is configured as a loopantenna.
 13. The metal rear cover for the terminal according to claim11, wherein a metal strip between two adjacent micro-seams within the atleast one micro-seam band is configured as an annular wire, and aplurality of metal strips among the micro-seams is configured as a loopelectromagnetic coil after the plurality of metal strips is suppliedwith a current.
 14. The metal rear cover for the terminal according toclaim 1, further comprising a circumferential frame fixed to acircumferential edge of the base plate, and the at least one micro-seamband passes through the circumferential frame.
 15. The metal rear coverfor the terminal according to claim 1, wherein the at least onemicro-seam band further comprises a signal non-shielding materialcompletely filled in the micro-seam.
 16. The metal rear cover for theterminal according to claim 1, wherein the radiation part coupled to thematching circuit is provided with a feeding point, and the feeding pointis electrically coupled to the matching circuit.
 17. The metal rearcover for the terminal according to claim 1, wherein at least one of theat least two radiation parts is grounded.
 18. A metal rear cover for aterminal, comprising: a base plate provided with at least one micro-seamband, the at least one micro-seam band dividing the base plate into atleast two radiation parts, at least one of the at least two radiationparts being configured to be coupled to a matching circuit and toreceive a feeding signal via the matching circuit; and a conductingswitch coupled between the at least two radiation parts, and configuredto disconnect or connect the at least two radiation parts.
 19. The metalrear cover for the terminal according to claim 18, wherein the metalrear cover for the terminal is configured to radiate at least two radiofrequency ranges by means of the conducting switch disconnecting orconnecting the at least two radiation parts.
 20. (canceled)
 21. Themetal rear cover for the terminal according to claim 18, wherein the atleast one micro-seam band comprises one micro-seam band, the onemicro-seam band divides the base plate into a first radiation part and asecond radiation part, and the conducting switch is coupled between thefirst radiation part and the second radiation part.